Lubricating apparatus



Oct. 15, 1929. H. .LvnJPHY4 LUBRICAT ING APPARATUS F'iied July 22, 1925 Patented @et 15, 1929 HOWARD J'. MURPHY, OF READING, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN MENTS, TO ALEMITE CORPORATION, OF

DELAWARE CHICAGO, ILLINOIS, A CORPORATION F LUBRICATING APPARATUS Application filed July 22, 1925. Serial No. 45,298.

. charge end of the gun showing the relation of the parts thereof when lubricant is being discharged therefrom at a relatively high potential pressure;

Fig. 3 is a front elevation of the lubricantexpelling device; 'y y t Fig. 4 is a section on the line 4-4 of Fig. 2; Fig. 5 is an enlarged section of the. nozzle part of lthe lubricant-expelling device engaged with a modified form of lubricantreceiving nipple; and e l Fig. 6 is a section on the line 6-6 of Fig. 5. Referring tothe drawings, I have shown a lubricant-expelling device which is simple, compact and inexpensive in construction. wIt includes means for expelling lubricant under an initially high pressureand then, if desirable, a continued low pressure, all of which q may be accomplished by very simple operations. may be expelled to a lubricant-receiving nipple under high then low pressure without Y the use of the usual coupling means formed onthe nipple and in the nozzle of the device,

as provided` in .other known devices for similar use. Further, the seal between the nipple and the device is formed by the use of a hatshaped sealing washer rather than by engagement of the end of the nipple with a flat or rounded washer as provided in other devices for similar use.

The drawings illustrate a lubricant-expelling gun including a supply barrel 1 having a front head 2 providing a guide for a slidably operated piston stem 3 carrying, interiorly of the barrel, a piston 4. The piston stem carries' a -displacing plunger 5 at its outer end which in turn carries a nozzle part 6 for engagement with 'a lubricant-receiving nipple.

The piston stem 3 is cored to provide a chamber 7 of relatively vsmaller' cross-secthe valve With the device illustrated, lubricanttional area than the barrel.= At each end of the chamber, I have provided means for entrapping the lubricant therein. -At the diswith a short passage 14 in front ofthe valve i 8 vso that lubricant may flow from the chamber 7 through the passages 14 and 13 when is unseated. The displacing plunger 5 is surrounded by a hat-shaped sealing washer 15 held in position against they end of the piston stem 4 by a removable cap 16. This sealing washer 15 prevents leakage of lubricant past the periphery of the displacing plunger.

The nozzle part 6 is tlireadedly vsecured to the end of` the `displacing plunger 5 and carries a hat-shaped sealing washer 17 held in place between a removable cap 18 and a shoulder at the outer end of the nozzle part thereby to provide a lubriant-pressed seal to prevent leakage of lubricant past a lubricant-receiving nipple as hereinafter de'- scribed.

The piston 4 may be urged toward the rear of the barrel 1 by a relatively sti sprino- 19 interposed .between the front head 2 and the piston 4, thereby to compress the lubricant sufficiently to feed lubricant to the chamber whenever there is space therein.

' A handle 20, is threaded into a reduced portion 21 at the rear end of the barrel 1 and a tight seal is provided between the parts by a suitable packing 22. The barrel 1 may be filled with lubricant by simply removing the handle 20, grasping the barrel 1 in one hand and pulling the piston 4 toward the front end of the gun and holding it there with theother while the barrel is refilled through the opening at the yrear end of the barrel and until the handle has been replaced.`

The device is then ready for use in connection with lubricating bearings .having lubri` cant-receiving nipples 23 attached thereto.

The nipple 23 illustrated-in Figs. 1 and 2 is provided with a threaded portion 24for engagement with a bearing and a smooth end portion 25 for engagement with the nozzle 6 without the usual interengaging .coupling means lprovided in connection with other known devices for similar use. y

Engagement of the gun witha nipple 2 may be eected by introducing the nozzle 6 over the smooth end portion 25 of the nipple' and sliding the nozzle relative to, the smooth end until the cap 18 abuts against a shoulder 26 between the threaded portion 24 and smooth end portion 2 5 of the nipple. Thus the smooth end of the nippleJ is surroundedlby the sealing washer '17 andthe lubricantpasage 27 in the nipple -communicates with the lubricant-conveying passages of the gun at the discharge end thereof.

' A; push on the handle 20 in the direction of the nipple when the gun is engaged-therewith,

urges the barrel 1 and the piston stem 3 toward the nipple as a unit. rl .`he nozzle 6 and Ldisplacing plunger 5 remain stationary dur.-

ing the operation so that the seat for the closure valve 8 may be moved away from the valve. The lubricant will thereby be displaced from the chamber 7 vand forced through the passages in the plunger 5 to the lubricant-receiving nipple under a relatively high potential pressure.

If a bearing requires more lubricant than it receives under high pressure from the chamber 7, a continued pushon the handle 20 will, after the cap 16 abuts against the nozzle part 6, urge the barrel forward relative to the remainder of the device.l Thus a quantity of lubricant may be forced fromjthe barrel past ythe ballcbeck 10, through the chamber 7 to the nipple 23 under a relatively lower potential pressure than when the lubricant is expelled solely from the chamber 7 Lubricant may be expelled entirely under high pressure by reciprocating-the'barrel l and piston stem 3 as a unit'relative to the displacing plunger 5.

During expulsion of lubricant to the nipple 23, the sealing washer 17 is pressed tightly against a portion of the smooth end 25 of the nipple by the lubricant back of that portion a of the washer which engages the nipple. Also the lubricant presses the hat-shaped washer 15 against the displacing plunger 5, thereby providing a lubricant-tight seal to prevent leakage. V,

The cross-sectional area of the displacing plunger 5 is greater than that of the smooth end ofthe nipple 23, thereby to prevent the resultant back pressure from disconnecting the nozzle from thenipple. The pressure on the sealing washer'15 aids largely in maintaining engagement between the nozzle and.

the nipple-when lubricant is being expelled at a relatively high potential pressure because the pressure is transverse rather than longi- Y udinal as in other known devices where no coupling means are used. This Washer thereby provides a more eifective seal vbetween the parts than does an'end seal method.

Referring to Figs. 5 and 6, I have illus.- trated a slightly modified form of nipple. In this instance, the smooth end portion of the nipple is provided with aneck or annular groove 28, into which the sealing washer is pressed to form the vseal between and the gun.

While I have shown and described a preferred embodiment of my invention, it will be the nipple understood that changes involving omission, substitution, alteration and reversal of parts and even changes in the mode of operation maybe made without departing from the scope of Vmy invention, which is best defined 7.

in the appending claims.

I claim 'i 1. A lubricant-expelling device comprising, in combination, a supply barrel, a chamber'ofrelatively smaller cross-sectional area than said barrel generally aligned therewith, a check valve between said barrel and said chamber for trapping lubricant in said chamber, a nozzle beyond said chamber and means for forcing the lubricant from said device under-an initially high pressure and thereafter under a lower pressure, said means being actuated by pushing said barrel towards said nozzle when the latter is engaged with a nipple,

2. Lubricating apparatus comprising, in Combination, a barrel, a chamber generally aligned with said barrel and presenting a substantially smaller cross-sectional area chamber generally aligned with said barrel and presenting a substantially smaller crosssectional area than said barrel, a valve between sad barrel and said chamber to permit passage of lubricant in one direction only,a nozzle beyond said chamber for engagement with a lubricant-1eceiving'nipplewithout in terengaging coupling means and a displacing plunger for expelling the lubricant from said chamber under relatively high potential pressure when said barrel and said chamber arel pushed toward the nipple. Y

4. A push-operated lubricant-expelling device comprising, incombination, a lubricant supply barrel, a chamber generally aligned with said barrel 4and presenting a substan-A tially smaller cross-sectional area thanvsaid barrel, a valve between said barrel and said chamber to permit passage of lubricant from said barrel to said chamber and to prevent return thereof, a springactuated piston slidable in said barrel to force lubricant from said barrel to said chamber, a nozzle beyond said chamber for engagement with a lubricant-receiving. nipple and va displacingl plunger rigidly secured to said nozzle an slidable in said chamber for expelling lubricant therefrom4 under relatively high potential pressure whenl said chamber and` said barrel are urged toward the nipple, said A barrel slidable relative to said chamber. 5. A push-operated lubricant-expelling device comprising, in combination, al lubricant supply barrel, a piston in said barrel for ex-A pelling lubricant therefrom, a chamber reciprocable with said piston, said chamber being of relatively small cross-sectional area and generally aligned with said barrel, a valve between the barrel and the chamber, a nozzle beyond said chamber for cooperative engagement with a lubricant-receiving nipple without interengaging coupling means and means for expelling the lubricant from said chamber to the nipple when said Vchamber is advanced toward the nipple.

6. A lubricant-expelling device including a supply barrel, a chamber of relatively smaller cross-sectional area than said barrel generally alignedgtherewith, means for automatically forcing the lubricant from said barrel to said chamber, a valve at each end of said chamber for trapping the lubricant in said chamber, a nozzle beyond said chamber for engagement with a lubricant-receiving" nipple and a displacing plunger slidable in said chamber for forcing lubricant therefrom under relatively high potential pressure when said barrel and said chamber are pushed as a unit toward the nipple.` .7. A lubricant-expelling .device including a barrel having a front head, a chamberpresenting part slidable in said front head, a piston rigidly secured to said part for forcing lubricant from said barrel to a chamber in said part, a nozzle part beyondsaid chamber presenting part for engagement with a lubricant-receiving nipple and -a plunger rigidly secured to said nozzle, said chamberpresenting part slidable relative to said plunger for expelling the lubricant from the chamber to a lubricant-receiving nipple.

ln testimony whereof, I have signed my name to this specification.

HOWARD J. MUR-PHY, 

